Scale



M. H. STARR.

SCALE.

APPLICATION man JAN-20, 1920;

1,385,592. Pat ented Ju1y2 6, 1,921.

9 SHEETS-SHEET INVENTOR ATTORNEY M. H. STARR.

v SCALE. APPLICATION FILED JAN- ZO, 3920 1 385592. Patented y 26, 1921..

9 SHEETS-SHEET 2.

INVENTOR 72 M. H. STARR.

SCALE. APPLICATION FILED JAN-20, 1920.

1,385,592. v v PatentedJulyZG, 1921.

9 SHEETS-SHEET 3.

INVENTOR ATTORNEY M. H. STARR.

SCALE.

APPLICATION FILED JAN.20,1920.

Patented July 26, 1921.

9 SHEETS-SHEET 4.

6 m m (mllli NVENTOR T M. 7H. STARR.

scALE.

. APPLICATION FiLED JAN.20, I920. I 1,385,592. Patented July 26, 1921.

9 SHEETS-SHEET 5.

31 H ii I Q a I v E? :5: 7 gr ATTORNEY M. H. STARR.

SCALE. AFPLQCATION FILED .IAN.20, I920.

Patented July 26, 1921.

9 SHEE S-SHEET 6 INVENTOR MJV BY Aha/(W m4 ATTORNEY M. H. STARR.

SCALE.

APPLICATION FILEQ 1AN.20, 1920.

I I I I 54 INVENTOR I ATTORNEY Patented July 26, 1921.

9 SHEETS-SHEET I.

M. H. STARR.

SCALE. APPLICATION FILED JAN-20,1920.

1,885,592. Patented July 26, 1921.

9 SHEETS-SHEET 8.

ENTOR ATTORNEY M. H. STARR.

SCALE.

' APPLICATION FILED JAN.20, 1920.

l,385,5 92. Patented July 26, 1921.

9 SHEETS-SHEET 9.

NVENTOR UNITED STATES PATENT OFFICE.

MORTON H. STARR, OF ST. JOHNSBURY, VERMONT, ASSIGNOR TO E. AND T. FAIR- BANKS AND COMPANY, OF ST. JOHNSBURY, VERMONT, A. CORPORATION OF VERMONT.

SCALE.

Application filed January 20, 1920. Serial No. 352,817.

and useful Improvements in Scales, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to scales, and more -are adapted for installation with railway tracks to weigh cars and other heavy loads.

It is an object of the invention to provide an improved scale of the character mentioned which is relatively simple in construction and reliable and exact in function under all conditions of service.

It is another object to provide an improved track scale embodying a system of levers for transmitting load stresses, and in which torsional strains in the levers are avoided. by means of improved connections therebetween.

Another object is to provide an improved scale employing a series of load transmitting members, and means for supporting said levers and assuring the maintenance thereof in accurate operative alinement under all conditions.

Another object is to provide an improved scale wherein dimensional changes of expansion and contraction due to temperature variations are ineffective to disturb the weighing precision of the apparatus.

It is also an object to provide an improved heavy duty scale wherein the several levers and their connecting means are of increased strength and durability, and wherein the assembly thereof is facilitated.

A further object is to provide a scale of the character referred to wherein certain of the parts in combination and in sub-combination are structurally superior and functionally advantageous.

Other objects and advantages will be in part apparent from and in part noted hereinafter in connection with the following description of an exemplary but preferred embodiment of the invention shown in the accompanying drawings, in. which- Figure 1 is a schematic view of the system of levers employed;

Specification of Letters Patent. Patented July 2 Fig. 2 is a plan viewof one of the main levers;

3 is a side elevation thereof;

F1 4 is a transverse sectional view substantially on the line 4-4 of Fig. 3;

Fig. 5 is a longitudinal view on the line.

5-5 of Fig. 4;

Fig. 6 1s a'perspective view of the suspension' bolt used in connection with the main levers shown in Figs. 2 to 5;

, Fig; 7 is a plan view of one of the center extension levers;

Fig. 8 is a plan view of one of the en extension levers;

.Fig. 9 is a transverse sectional view taken substantially on the line 99 of Figs. 7 and 11 and showing the knife-edge pivotal bearing and part of the connections between a pair of main levers and one of the center extension levers;

Fig. 10 is a transverse sectional view on the line 1010 of Figs. 7 and 11 and showmg the knife-ed e pivotal bearing between the center extension lever and its supporting stand;

Fig. 11 is a longitudinal sectional view of a center extension lever taken on the line 11-11 of Figs. 7 and 10;

Fig. 12 isa detail sectional view of the connections between adjacent ends of two main levers taken approximately on the line 12-12 of Fig. 2;

Fig. 13 is an elevational View of one of the Fig. 16 is a fragmentary side elevationalview of the adjacent ends of the center and end extension levers,- certain parts being Fig. 19 is a perspective view of the parts used in the connection of the center extension levers with the fifth lever; and

Fig. 20 is a transverse sectional view of the means at the free end of the fifth lever for connecting the same with the steelyard.

Referring more particularly to the illustrated embodiment of the invention and the general-layout of Fig. 1 four spaced pairs of main levers (designated AA, BB CC and DD) are employed to receive the superposed load and transmit the same proportionally to extension levers (designated EE' and FF) which in turn transmit a predetermined reduction of the load to a fifth lever G adapted for connection with a scale beam. Each main lever is fulcrumed atits outer end on a knife-edge support 1, and is connected at its opposite end to its oompanion member and to the superposed extension lever by means constructed and associated to transmit the pull incident to the load being weighed in a line substantially coinciding with the intersection of the center planes through the thus connected main and extension levers. Torsional and binding strains on the operating parts are thus avoided.

The several pairs of main levers and extension levers are preferably arranged in a pit beneath the track and parallel longitudinal girders (not shown) are positioned vertically above the main levers, each girder being arranged to carry one of the track rails and to transmit the load stressesito one member of each pair of main levers through connections as shown in Figs. 4 and 5, and

to be described. The longitudinal girders are also suitably connected to form the loading platform. The train of extension levers, as referred to, comprise end extension levers EE, and center extension levers FF, the former being pivotally supported on knifeedges 2 at their outer ends and the latter being similarly supported at 3 midwa of their length. The free end of each en extension lever is connected tothe adjacent end of a center extension lever, and the adjacent ends of the center extension levers. are connected together and to the fifth lever G by improved connecting means which transmit the load stresses in the vertical center planes of movement of the respective levers so as to avoid torsional and binding strains.

As shown more particularly in Figs. 4

and 5, each main lever casting comprises side walls 4 integrally connected at their ends and also connected by one or more in termediate webs 5. Each main lever is pivotally mountedat its outer end on a pedestal or stand 6 through a hardened steel bearing comprising a concave seat 7 and the engaging knife-edge pivot 1 securely fixed in the main lever. Load stresses aretransmitted from the scale platform to the respective main levers through main girder chairs 8, each of the latter being composed of a casting having spaced depending legs 9 which have concave recesses 10 on the lower ends arranged to contact with trunnions 11 on an adjustable trunnion block 12. There is thus formed a pivotal support between the girder chair and the main leverwherein the pivotal axis extends longitudinally and centrally of the main lever between the side Walls 4: and whereby slight movement of the girder chair transversely of the lever is permitted. The trunnion block 12 also has a central vertical opening through which extends a suspension bolt 13 having transversely projecting lugs 14 at its upper end arranged to extend into openings in the spaced side walls 15 of a saddle member 16 and to be pivotally supported by concave bearings of the side walls mentioned. The saddle member in turn has its ends adapted to seat in recesses in the upper faces of two separate bearing blocks 17 and 18, each of the latter being fitted with a concave bearing seat 19 to receive a pivotal knife-edge 20, as shown more clearly in Figs. 2 and 4. The knife-edge pivots 20 are securely fixed in the thickened side walls 4 of the main lever, and it will be noted that the bearings are of substantial length whereby the maximum amount of the load weighed which is transmitted to the main lever is adequately provided for. The bearings also are separated so that there is ample clearance therebetween for the centrally disposed suspension bolt 13 which thus is boxed in the registering openings between the side walls of the main lever and of the saddle and centrall of the bearing seats thereof. The bolt is t readed on its lower end and an adjusting nut 21 .is.

screwed thereon for the purpose of adjustablypositioning the trunnion block 12 to govern the relative vertical disposition of the main girder chair with respect to the corresponding main lever. This adjusting nut may also be provided on its upper surface with a plurality of radial recesses 22, and the trunnion block may have a pair of complementary projections 23 adapted to engage in a pair of said depressions to lock the members against relative rotation.

The construction described provides in effect a universal joint between the girder chair and the main lever. At the same time the disposition of the pivotal bearing points is such that the load is transmitted substantially linearly at the intersection of the center planes of the girder and the main lever. Furthermore the construction described is of especial advantage in that the castingsand parts are capable of ready manufacture and expeditious assembly; that is to say. the bearing blocks 17 and 18 may be readily placed on the side walls of the 24 secured in position mainlever, the saddle block 16 then positioned, and the suspension bolt 13 installed from above with its top projections 14 turned to pass between the side walls 15 of the saddle until the projections are opposite the saddle wall openings whereupon the suspension bolt is rotated to position the lugs in the bearing seats therefor of the saddle. The trunnion block 12 and nut 21 are then positioned upon the depending end of the suspension bolt from below. The girder chair 8 straddles the saddle 16 and the suspension bolt and may be thus readily positioned. 1

The connections for transmitting the load stresses from the several pairs of main levers to the corresponding extension levers are similar in each instance, and Figs. 9, 11 and 12 show details of the typical connection between one pair of main levers and one of the center extension levers. As here shown, thefree ends of the main levers overlap in the plane of and below the extension lever, one being disposed above the other and spaced therefrom, and each being fitted with a transversely extendin knife-edge pivot by dowel pins, or otherwise, and seated on concaved bearings 25 suitably secured in grooves in the upper surfaces of a pair of bearing blocks 26. Each bearing-block 26 has apertures through the end portions thereof through which extend the lower threaded ends of spaced bolts 27.

Nuts 28 screw on the bolts and are arranged to engage the under surfaces of the bearing blocks 26 and to support the latter in adjusted position to receive the load. The free ends of'the main levers thus extend between the supportin bolts 27 and are arranged to transmit t e load stress through the knife edge ivotal bearings to the respective bearin b ocks 26 and thence through the bolts 2 7 to the cones onding extension levers. Bolts 27 are hea ed at their upper ends and pass through end apertures in an upper bearing block 29 disposed between the webs of the extension lever and extending into side openings 30 in said webs. This bearing block 29 has a concaved seat 31 mounted in the under surface thereof and arranged to receive a knife-edge pivot 32 which is suitably secured in a groove in a transverse integral web 33 between the side 7 walls of the extension lever. The connection described provides ready adjustment of the parts and permits eas replacement when desired and also provi es for the transmission of the load stresses in the'centerplanes of movements of the levels, that-is, to-say, substantially linearly in the intersection of the center planes of pivotal movement of the main and extension levers.

From each of the end extension levers EE' load stresses are transmitted tothe center extension levers FF through bearings and connections designedto transmit the forces approximately in the longitudinal vertical center planes of movement of the levers, so as to prevent unequal Wear of the bearings and to avoid torsional and binding strains in the levers themselves. By this construction the accuracy of the scale is enhanced and its effective life prolonged. The details of these connections are the same and are shown particularly in Figs. 14, 15 and 16. As there illustrated, each comprises an adjustable nose iron 34, preferably cast metal, which is secured to the end extension lever E as by bolts 35 passing through openings in flanges of the lever and through longitudinal openings in laterally extending flanges of the nose iron. The extension lever is also fitted with a longitudinally extending groove also mounted on the upper surface of the end of center extension lever F to be longitudinally adjustable in the groove 41. An adjusting bolt 42 passes through an aperture in a casting 43 and is threaded at its end to engage a threaded recess in the casting 40. This bolt is also fitted with a lock nut 44 to hold the nose iron in adjusted position. The casting 43 may be secured to the tip end of center extension lever F by suitable bolts.

On each side of the longitudinal center line of casting 34a short knife edge pivot bearing 45 is secured transversely of the lever and a similar knife edge pivot 46 is secured centrally of the nose iron 40. Extending transversely of the extension levers is an inverted U-shaped connection or bearing yoke 47 having laterally projecting lugs 48 at the outer extremity of the arms thereof, and the upper surfaces of these lugs are channeled to receive bearing spools 49, preferably of hardened steel and circular in cross-section. A bearing sea't50 rests on each of the spools mentioned and is engaged by knife- -edge pivots 45 coiiperating to transmit the It will thus be evident that the connection described transmits the load stress. from the end extension levers to the center extension levers 1n the plane of movement of said lea strong and stable connection therebetween.

vers, that adjustment in length of the relative lever arms for sealing the scale is facilitated, and that the various partstare capable of ready assembly or removability when desired.

The end extensionlevers EE which carry knife edges 2 of substantial length, are supported at their outer ends on pedestals. The center extension levers FF are similarly supported on suitable stands or pedestals 53, one of which is shown in Figs. 10 and 11 with its connections to the extension lever. As shown, the pedestal has a central web having recesses 54 in its upper edge and into which extend the side webs of the center extension lever. Suitably secured to the upper surface of said pedestal, as by bolts 55, is a transverse bearingblock 56 extending through openings in the; side walls of the extension lever and supported .by and secured to which is a bearing seat 57 to receive a knife-edge pivot 58;in turn mounted in a groove in the under surfaceiof a transverse web 59 between and integral with the side walls of the extension. lever. The load on )the center extension lever from the end extension lever is thus;oarr ied by the knifee d e pivotal connection to the pedestal 53.

T he connections between the ends of the extension levers FF and the end of the transverse lever G are shown particularly in Figs. 17, 18 and 19. As there illustrated, the end of one center extension lever overlaps the end of the other in a vertical plane and the overlapping ends are connected to the end therebelow of the transverse lever which may be arranged at any desired angle to the extension levers. Longitudinally adjustable nose irons 60 similar in general to the nose iron 40 above describedyare mounted on the upper surfaces of the ends of leveis F'F, respectively, whereby knife-edge pivots 61 and 62 carried thereby may be adjusted and locked in vertical alinement and the scale correctly sealed. The knife-edge pivots 61, 62 seat against concaved bearings 63 and! 64, mounted in grooves in the under surfaces of transverse bearing blocks 65 and 66, respectively. These bearing blocks are apertured at their ends to receive pairs of tension bolts 67 and 68, respectively. The

bearing block 66 is longer than the bearing block 65 (Fig. 19) so that the bolts 68 are disposed outside of the bolts 67 and bearing block 65. The lower ends of the two pairs of tension bolts are threaded and extended through vertically alined end openings in a complementary transversely disposed yoke 69. A plurality of nuts are threaded on the lower ends of the bolts 67 and 68 whereby the yoke 69 may be positioned to receive equally the load forces transmitted through the center extension levers FF. The yoke 69 is also centrally apertured to receive the upper end of the headed tension bolt 71, the lower end of which passes through a central opening 72 in a bearing block 73 disposed beneath the inner end of the transverse lever I. concave bearings 74 at opposite sides of the aperture 72 to receive the lmife-edge pivots 75 suitably mounted in grooves in the under surface of the innerend of the transverse lever G, which is also apertured centrally to provide clearancetherethrough for the tension bolt 71.

By the construction described it will thus bev seen that the load stresses are here also transmitted in the planes of movement of said levers, and substantiallyin a line coincident with the intersection of the center planes of movement of the extension levers and the fifth lever, respectively. Consequently torsional strains and unequal wear of the bearing parts are avoided.

' Suitable connecting means between the outer free end of the transverse lever G with the steelyard and beam are provided. As shown in Fig. 20, this connection includes a nose iron 76 adjustably mounted on the lower surface of the transverse lever and carrying a transverse knife-edge pivot 77 to bear on the concaved surface of a complementary seat 78, in turn supported by a transverse bearing block 79. The bearing block :79 is apertured at its ends to receive the lower ends of a U-shaped bolt or clevis 80 through which the load stresses are in turn transmitted to the beam of the scale.

It will be understood that the various knife-edge pivots and the concaved bearing seats therefor as employed through the lever system are of hardened steel or other suitable wear-resistant material. It will be observed further that the knife-edge bearings described are of graduated dimension, decreasing in length as the quantitative load force transmitted thereto decreases, but that in each instance the connection between the levers is such as to provide adequate dimension of the pivotal bearing parts. The sealing of the scale, as a whole, can be expeditiously effected by reason of the various adjustable connections whereby the respective lengths of the connecting lever arms are variable. The webbed construction of the levers, while of advantage in strengthand durability, is of especial further superiority in combination with the improved connecting means between the levers as described.

The functional and structural objects above stated are thus seen to be obtained in the construction described. It is to be understood that certain features of the invention are capable of modification and combination. in scales of other types without sacri fice of the attendant advantages.

This bearing block is fitted with spaced Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1; In a scale, in combination, a ing spaced bearings and an opening centered therebetween, and a load transmitting member disposed through said opening and having an operative connection with said spaced bearings whereby said member is pivotally movable in a plurality of planes.

2. In a. scale, in combination, a lever having spaced bearings and an opening centered therebetween, a rigid member having a pair of bearin s cooperating with said first bearings and having a centered opening registering with said first opening and having opposed bearings at the sides of said opening at substantially right angles to said pair of bearings, and a load transmitting member disposed through said openings and having bearings to cooperate with said opposed bearings. Y

3. In a scale, in combination, a' rigid lever having spaced bearings and an opening centered therebetween, a load transmitting member disposed through said opening and having an operative connection with said.

spaced bearings whereby said member is plV- otallymovable in a plurality of planes, and a loading member having legs to straddle said first member and pivotally connected thereto below the plane of connection of said first member to said lever.

4. In a scale, in combination, a lever having spaced bearings and an opening centered therebetween, a rigid member having bearings cooperating with said first bearings and havlng a center opening registering with said first opening and having opposed bearings at the sides of said center opening at substantially right angles to said pair of bearings, a load transmitting member disposed through said openings and having bearings to cooperate with said opposed bearings. and a loading member having legs to straddle saidfirst member and pivotally connected thereto below the plane of connection of said first member to said lever.

5. In a scale, in combination, a rigid lever having spaced bearings and an opening centered therebetween, a rigid saddle having a pair of bearings cooperating with said first bearings in one horizontal plane and having a center opening registering with said first opening and having opposed bearings at the sides of said center opening at substantially right angles to said pair of bearings, and a load transmittingv member disposed through said openings and having bearings to cooperate with said opposed bearings in a horizontal plane below said first mentioned plane.

6. In a scale, in combination, a rigid lever having spaced bearings and an opening lever havposedzbearings in a horizontal plane adjacent said first mentioned plane, and a loading member having legs to straddle said saddle and pivotally connected to said load transmitting member in a plane below both i of said first mentioned planes.

7. In a scale, in combination,'a rigid lever having spaced bearings and an opening therebetween, a load member having spaced legs disposed through said opening, a load transmitting member disposed through said opening and between said legs, cooperating bearings between the lower end of said second member and the legs of said first member to permit pivotal movement of the latter at right angles to the plane of movement of said lever, and an operative connection between the upper end of said second member and the bearings of said lever to permit pivotal movement-of said second member in planes parallel and at right angles to the stresses substantially in a line centrally between said bearings and said legs.

9. In a scale, in. combination, a rigid lever having spaced bearings and an opening therebetween, a load member having spaced legs disposed through said opening and at right angles to the plane of movement of said'lever, and connecting means between said lever and said member to transmit theload stress substantially in a line centrally between said bearings and said legs.

10. In a scale, in combination, a rigid lever having spaced bearings and an opening therebetween, a load member having spaced legs disposed through said opening, and connecting means between said lever and said member including an element disposed centrally between said spaced bearings and said 1e s.

ll. In a scale, in combination, a rigid lever having spaced bearings and an opening therebetween, a load member having spaced legs disposed through said opening, and connecting means between said lever and said member including an element disposed centrally between said spaced bearings and said legs and having a pivotal connection at its upper end with said lever and a pivotal connection at its lower end with said le s.

lQ. In a scale, in combination, a rigid lever having spaced bearings and an opening therebetween, a load member having spaced legs disposed through said opening, and connecting means between said lever and said member including a bolt disposed centrally between said spaced bearings and said legs and having a pivotal connection at its upper end with said lever and a vertically adjustable pivotal connection at its lower end with said legs.

18. In a scale, in combination, a rigid lever having spaced bearings and an opening therebetween, a load member having legs disposed through said 0 ening, a load transmitting element dispose between said legs and through said opening, and pivotal connections between said element and said legs and between said element and said lever whereby said element may swing relatively to said load member in one plane and relatively to said lever in a plurality of planes.

14. In a scale, in combination, a rigid lever having spaced alined bearings and an opening therebetween, a load member havmg legs disposed through said opening, a

load transmitting element disposed between said legs and through said opening, and pivotal connections between said element and said legs and between said element and said lever whereby said element may swing relatively to said lever in the plane of movement of the latter and at ri ht angles thereto.

15. In a scale, in com ination, a rigid lever fulcrumed at one end and arranged to transmitthe load through its other end and having spaced transversely alined bearings intermediate its ends and an opening between said bearings, and a load transmitting member disposed through said opening and havin an operative connection with said space bearings. whereby said member is pivotally movable with respect to said lever in the plane of pivotal movement of the latter and in a lane at right angles thereto.

16. In a sea e, in combination, arigid lever having spaced side walls connected at their ends, said sidewalls having transversely registering apertures with thickened portions therebelow constituting bearings, a rigid saddle having spaced side walls connected at their ends, said saddle extending through said openings in said lever side walls and having end bearings to cooperate with said lever bearings, and a load transmitting member suspended from'said saddle centrally between the side walls thereof and the side walls of said lever.

-17. In a scale, in combination, a rigid lever having spaced side walls with registering openings therein, a rigid saddle having spaced side walls withregistering openings therein, said saddle extending transversely I through said openings of said lever, bearings between the ends of said saddle and the side walls of said lever, a load transmitting member disposed vertically and centrally between the side walls of said saddle and the side walls of said lever and bearings between said member and the side Walls of said saddle.

18. In a scale, in combination, a rigid lever having spaced side walls with transversely registering openings therethrough, a rigid saddle having spaced side walls with registering openings therethrough, said saddle extending transversely through the openings of said lever, and a load transmitting member extending vertically and centrally between the side walls of said lever and the side walls of said saddle and having opposed bearing projections extending through the openings of said saddle.

19. In a scale, in combination, a rigid lever having spaced side walls with registering openings therethrough, a rigid saddle having spaced side walls with registering openings therethrough, said saddle being insertible transversely of said lever through the openings of the latter, and a load transmitting member having opposed upper bear: ing extensions, said member being insertible vertically between said side walls of said saddle and being rotatable thereafter to extend said bearing projections through said openin of said saddle.

20. n a scale, in combination, a rigid saddle having spaced side walls, bearings for the ends of said saddle, a load transmitting member extending between the side walls of said saddle and suspended vertically therefrom, a trunnion supported at the lower end of said member, and a loading element having spaced legs to straddle the side walls of said saddle and to engage with said trunnion.

21, In a scale, in combination, a plurality of spaced parallel pairs of' pivoted main levers, the levers of each pair being arranged end to end, a load member for each main lever having a pivotal movement at right angles tp the pivotal movement of. the correspondmg main lever, a plurality of pivvoted extension levers arranged end to end and disposed at right angles to said main levers, a pivoted transverse lever extending at an angle to said extension levers, and operative connections therebetween to transgnit the load stresses from said members through said main levers through said extension levers to' said transverse lever in lines substantially coinciding with the respective intersections of the center planes of pivotal move ent thereof.

22. n a scale, .in combination, a girder chair, a main lever and connectingimeans therebetween for transmitting load stresses, said means including spaced knife edge and bearing blocks.

memes bearings and a sus ension member co6perating with said chair and arranged to transmit the stresses centrally of said bearings.

23. In a scale, in combination, an end extension lever and a center extension lever,

said levers being arranged end to end, a I

pivotal connection between said levers including an inverted U-shaped saddle having a central bearing on one of saidlevers and end hearings on the other of said levers.

24. In a scale, in combination, a pair of levers for transmitting load stresses from one to the other, nose irons on the adjacent ends of said levers, and a bearing therebetween including an inverted U-shaped 'saddle coacting centrally with one of said noseirons and coacting at its ends with the other nose-iron.

25. In a scale, in combination, two levers for transmitting load stresses, a bearlng therebetween including a saddle having transversely extending supporting lugs, a bearing spool and a bearing block supported on each of said lugs, and a bearing spool and a bearing block disposed centrally of said saddle and on the opposite side thereof with respect to said first mentioned bearing spools 26. In a scale, in combination, a pair of levers having pivotal bearings arranged in different horizontal planes, a lever disposed at an angle with respect to said first mentioned levers, and below said bearings and independent connections between said'pair of levers and said lever, said connections being supported by said bearings.

27. In a scale, in combination, a pair of levers having overlapping ends, one above the other, separate U-shaped means respectively embracing said ends and each having an extended bearing-across one of the same, a transverse element having independent adjustable connections with each of said means, a transverse lever having spaced bearings and means connecting said spaced bearings and said element to transmit the load stress substantially in the line of intersection of the planes of movement of said levers.

28. In a scale, in combination, a pair of extension levers having spaced ends overa transverse lever,

lapping in the plane of load transmission,

a yoke, spaced connecting means between one of said levers and said yoke, spaced connecting means between the other of said levers and said yoke embracing said first connecting means, and

connecting means between said 'yoke and said transverse lever.

29. In'a scale, in combination, a pair of extension levers having'spaced overlapping ends, a transverse lever, a yoke, spaced connecting means between one of said levers and said yoke, spaced connecting means between the other of said levers and said yoke embracing said first connecting means, and connecting means between said yoke and said transverse lever and embraced by both of said connecting means.

30. In a scale, in combination, a pair of overlapping extension levers, a transverse lever, bearing blocks pivotally engaging said extension levers, a yoke, transversely spaced connecting means between one of said blocks and said yoke embracing one of said levers, transversely spaced connecting means 'between the other of said blocks and said yoke embracing both of said levers, and connecting means between said yoke and said transverse lever.

31. In a scale, in combination, a plurality of spaced pairs of main levers, extension levers arranged end to end at right angles to said main levers and centrally above the latter, a transverse lever arranged at an angle to said extension levers and centrally with respect thereto and to said main levers, and operative connections between said main levers and cotiperating extension levers and between adjacent extension levers, and between said transverse lever and coiiperating extension levers whereby the load is transmitted substantially in the center plane of movement of each of said levers.

In testimony whereof I afiix my signature, in the presence of two witnesses.

MORTON H. STARR.

Witnesses PERLEY F. HAZEN, RAYMOND C. PEARL. 

